ExtJS mvc loading view after successfully logged in

I am trying to develop an application in ExtJS using MVC. The aim of design application is something: 1. Create a log in page for authentication 2. after successful log in I have to show 3 grids in single page. These 3 grids have different stores and models.I am able to design login page, but I am facing problem in going fwd to next view after logged in.

I have tried to call Order from DisplayGrid which eventually gives errors so I tried to go directly with the view/Order.Please guide me this I was trying this thing from long time and I am doing something really wrong. I have tried this but every time it gave me error